Amplitude of climatic changes in Qinghai-Tibetan Plateau

On the basis of ice core and meteorological data from the Qinghai-Tibetan ( Q-T) Plateau, this article focuses on the discussion of the problems relate d to the sensitivity of temporal and spatial changes of the climate in high -altitude regions, particularly in the Q-T Plateau. The features of abrupt climatic changes of the past 100 ka, 2 000 a and recent years indicate that the amplitude of these changes in the Q-T Plateau was obviously larger tha n that in low-altitude regions. The scope of temperature change above 6 000 m in the Q-T Plateau between glacial and interglacial stages could reach o ver 10 degrees C, but only about 4 degrees C in low-elevation regions close to sea level. During the last 2 000 a, the amplitude of temperature change s at Guliya (over 6 000 m a.s.l.) in the Q-T Plateau reached 7 degrees C, i n comparison with 2 degrees C in eastern China at low altitude. In the pres ent age, apparent differences of climatic warming have been observed in the Q-T Plateau, indicating that the warming in high-elevation regions is much higher than that in low-elevation regions. The temperature in over 3 500 m regions of the Q-T Plateau have been increasing at a rate of 0.25x10 (1)/a in recent 30 years, but almost no change has taken place in the regions be low 500 m. Thus, we concluded that high-altitude regions are more sensitive to climatic changes than the low-altitude regions.